If you are booked. Sign in. Got to already booked, manage my bookings, select the booking. Now you are on your itinerary page. Click shore excursions, sort through ports. Read the descriptions, if you like it click buy now. It will ask for which people and if you want to use your credit. Click the appropriate boxes, place in cart. Go to cart and buy. You can also call and the shore excursions personnel can see your cart and help you complete